Bi-annual	US dollars
1987-06-30	147
1987-12-31	128
1988-06-30	164
1988-12-31	416
1989-06-30	301
1989-12-31	90
1990-06-30	54
1990-12-31	52
1991-06-30	3
1991-12-31	11
1992-06-30	4
1992-12-31	9
1993-06-30	24
1993-12-31	24
1994-06-30	20
1994-12-31	11
1995-06-30	14
1995-12-31	14
1996-06-30	9
1996-12-31	9
1997-06-30	5
1997-12-31	5
1998-06-30	5
1998-12-31	5
1999-06-30	5